The contractor agrees that the contracting officer, the Comptroller General of the United States, or the Secretary of the Interior, or any of their duly authorized agents or representatives, shall, until the expiration of three years after final payment under this contract, have access to and the right to examine any directly pertinent books, documents, papers, and records of the contractor involving transactions related to this contract.

The contractor further agrees to include in all his subcontracts hereunder a provision to the effect that the subcontractor agrees that the contracting officer, the Comptroller General of the United States, or the Secretary of the Interior, or any of their duly authorized agents or representatives, shall, until the expiration of three years after final payment under the subcontract, have access to and the right to examine any directly pertinent book, documents, papers and records of such subcontractor, involving transactions related to this contract.